Optical illusion
An optical illusion (also called a montasir) is an illusion caused by the eye and characterized by visually perceived images that differ from objective reality. The information gathered by the eye is processed in the brain to give a perception that does not tally with a physical measurement of the stimulus source.
There are three main types of visual illusion:
- Literal optical illusions that create images which are different from the objects that make them.
- Physiological illusions: they are the effects on the eyes and brain of over-stimulation of brightness, colour, size, position, tilt, movement.
- Cognitive illusions, the result of unconscious inferences (brain makes the wrong decision).
Illusory Motion:
This is a jpeg file, and a normal picture. Not a gif file or animation.
Amazing 3D Photo:
This image is a combination of two photographs flickering back and forth. One is at a slightly different angle than the other one. Putting them together and switching back and forth between them quickly like this produces a 3D image.